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No. 591,702. Patented Oct. 12,1897.

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No. 591,702. Patented Oct. 12,1897.

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No. 591,702. Patented Oct. 12,1897.

yr an UNITED STATES PATENT OFFICE.

OBERLIN SMITH, OF BRIDGETON, NEW JERSEY.

PRESS.

SPECIFICATION forming part of Letters Patent No. 591,702, dated October12, 18 97. Application filed June 5, 1896. Serial No. 594,452. (Nomodel.)

To all whom it may concern: Be it known that I, OBERLIN SMITH, ofBridgeton, in the county of Cumberland, andin the State of New Jersey,have invented cer tain new and useful Improvements in Presses; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,in which Figure l is a perspective view of my press; Fig. 2, a sideelevation, partly in section; Fig. 3, a detail top plan view of theindexing mechanism; Fig. 4, a front elevation thereof; Fig. 5, avertical section on the line LE to of Fig. 4; Fig. 6, a detailperspective view of the parts of the indexing-wheel separated; Fig. 7, asimilar view of the work-holder or chuck; Fig. 8, a detail view insection of the means for coupling the pitman and eccentric-strap; Fig.9, a like view showing the means for connecting the pitman and thepitman-pivot.

Letters of like name and kind refer to like parts in each of thefigures.

The design of my invention is to provide an improved punching or cuttingpress; and to this end said invention consists in the press having theconstruction and combination of parts substantially as and for thepurpose hereinafter specified.

In the carrying of my invention into practice I employ a cast-metalframe that consists of a base or pedestal A and an upright or standardB, rising from the latter and having at its mid-height a bed 0.Journaled in suitable bearings at the top of the standard is ahorizontal shaft D, upon the rear end of which is loosely mounted adrive or fly wheel E, that is adapted to be clutched to and unclutchedfrom the shaft by a suitable clutch mechanism F. Near its front end theshaft carries an eccentric G, the strap H of which is provided on itsunder side with a round opening h for the reception of the round reducedextension 2'- of the upper end of the pitman I. Encircling saidextension is a' groove 2", whose upper side is downwardly inclined, intowhich groove projects the correspondingly-shaped end of a pin K in ahorizontal opening that is provided in the cocentric-strap H. Engagingthe outer end of said pin is a screw L, by means of which the pin may bemoved inward to cause the inclined surface on its inner end to engagethe like surface of the annular groove 2' of the pitman and therebyfirmly seat the upper end of the latter against the eccentric-strap.

The lower portion of the pitman is threaded, and upon the same isscrewed a circular block M, that is journaled in a horizontal opening inthe vertically-sliding ram N and constitotes the pivotal connectionbetween the latter and the pitman. In the rear side of said block is acircular opening which extends through to the threaded stem-engagingopening and in which is placed a circular block 0, whose inner face iscurved and threaded in conformity to the threaded part of the pitman,and said block 0 is clamped against the latter by two bolts P and P,that are attached to said block 0 on diametrically opposite sides of thepitman and pass outward through open ings in the pivot-block and haveeach a nut 19 on its outer end, which abuts against the outer face ofsaid pivot-block. By means of the bolts and nuts and the block 0 theconnection between the pitman and the pivotblock can be made secure andfirm against tendency to loosen from the movement and the jar of partswhen the press is at work. In such work as punching a number or seriesof openings in one piece atregular distances apartas, for instance, thenotches in the rims of armature-disks, where an indexing or feedingmechanism is employed-it is necessary that each opening or notch shallbe punchedunder precisely the same conditions as the others to insureuniformity in their spacing. Variation usually occurs as to the firstopening punched if the punch is allowed to work at the first stroke ofthe press, since obviously the conditions of momentum and springofmaterial are different at the beginning of the operation of the pressfrom those that exist when the same is at high speed. To enable thefirst work done by the punch to be under the same conditions as thesubsequent work, I provide means whereby the punch may be readily placedin and out of position for operation, so that the press can be run withthe punch inactive to bring about the desired condition. Such meansconsists of a handle or lever Q, that is fastened to the upper end ofthe pitman and projects to the front of the press in convenient positionto be grasped and swung to the right or left, and thus by turning thepitman cause,th rough its threaded connection with its pivot-block, theraising or lowering of the ram, and consequently the removal of thepunch from or its placing in position for work.

The handle or lever Q is provided with a downwardly-extending pin q,that is adapted by engagement with the outer face of the pivot-block tolimit the swing of the handle, and thus the amount of vertical movementof the punch. Said handle is preferably detachably connected with thepitman,

Keyed upon the front end of the shaft D is a worm R, that meshes with atoothed wheel S upon the upper end of a vertical shaft T, which at itslower end carries a clampingdisk U, that, with a similar disk V, pivotedby a taper stud or pin I) to a table or bolster IV, bolted to thepress-bed O, constitutes a chuck for the work, in the form of a disk X,that is to be, punched. The two chuck-disksU and V are coupled to causethem to rotate together by a block or key Y, that projects up ward fromthe lower disk into a slot to in the upper one. Upon its outer face saidkey has a vertical projection or rib y, adapted to engage a notch in thedisk X to couple the latter to and cause it to rotate with the chuck.

To permit the work to be placed in and removed from the chuck, the upperdisk U is vertically movable relative to the others and is raised bymeans of a cam-lever Z, that engages the under side of a collar 15 uponthe shaft '1, and is adapted to raise the latter and with it the wheelS. The lowering of said disk U is effected by gravity, and as the weightof the wheel S and the shaft T are utilized it will be seen that thework X will be firmly held or clamped in the chuck. The shaft T ismounted in bearings 66 and a, that project horizontally from a verticalpost or standard A, rising from a horizontal arm B, which is bolted tothe table or bolster W'. The camlever Z is pivoted to the post A. Ofcourse during the operation of the punch upon the work thelattermustbeimmovable, and hence it is necessary that the feeding orrevolution of the work be step by step or intermittent. To accomplishthis result, the thread of the worm R is not continuously inclined, buta portion or portions of its length are arranged in planes at a rightangle to the axis of the shaft D, so as to have no moving efiect uponthe wheel S. The teeth of the latter, for proper cooperation with theworm, in view of this peculiar arrangement of its thread, have inclinedsurfaces for engagement with the inclined portions of its thread, whileto permit the free passage of the uninclined parts there- 'of they havesurfaces that extend in planes parallel with the axis of the shaft T.This device I term a drunken worm.

My peculiar adaptation of the worm-gear affords a most simple, cheap,and yet thoroughly efficient intermittent or indexing feed.

To enable the ready exchange of one wheel S for another of differentdiameter for the punching of different sizes of work, I make said wheelin the form of a ring or annulus and fix to the shaft T a ring or disk Bof slightly greater diameter than the internal diameter of the wheel,to-which the latter is detachably connected by bolts 0' and 0 Thisconstruction renders it necessary that the shaft T be movable toward andfrom the worm R, and accordingly the support of said shaft is adjustablyconnected to the bolster or table W.

In using my drunken-worm intermittent feed, I do notlimit myself tonotching disks and such work, but among other different uses it may beemployed when there is attached to the lower end of shaft T a perforateddial in which separate pieces of work, as cartridges, &c., aresuccessively placed to be fed under the punch in the usual manner.

Having thus described my invention, what I claim is 1. In a press, thecombination of the toolcarrying ram, the driving-shaft, an eccentric onthe latter connected with the ram, the worm on the shaft having aportion of its thread uninclined, a second shaft mounted parallel withthe line of movement of the ram, a table, or support, from which rises astandard, or postthat journals the second shaft,

a wheel on said second shaft, meshing with the worm, and a work-holderconnected with such shaft, substantially as and for the purposespecified.

2. In a press, the combination of the toolcarrying ram, thedriving-shaft, an eccentric on the latter connected with the ram, theworm on the shaft having a portion of its thread uninclined, a secondshaft mounted parallel with the line of movement of the ram, a table orsupport, from which rises a standard or post that journals such secondshaft, awheel on said shaft, meshing with the worm, a work-holderconnected with said second shaft, a collar on the latter, and alifting-lever, to act on said collar, pivoted to the standard, or post,substantially as and for the pur-- with an extended bearingcircumferentially and radially, means to move said pin, and a ramconnected with the pitman, substantially as and for the purpose setforth.

4. In a press, the combination of a shaft,

an eccentric thereon, the eccentric-strap provided with an opening,a'pitman having an extension projecting into said opening, an annulargroove in said extension having an inclined side, a pin engaging saidgroove having its end of less thickness than the width of the groove, ascrew engaging the pin, and a ram connected with the pitman,substantially as and for the purpose described.

5. In a press, the combination of the punchcarrying ram, a shaft, athreaded pitman connecting the shaft and ram, a handle applied to thepitman, whereby it may be turned, and a stop-pin carried by the handle,substantially as and for the purpose described.

6. In a press, the combination of the punchcarrying ram, a shaft, aneccentric thereon, a pitman connected with the eccentric, a pivot on theram, a threaded connection between the pitman and the pivot, a handle onthe pitman, and a stop-pin on the handle adapted to strike the pivot,substantially as and for the purpose shown.

7. The combination of a work-holder composed of upper and lower parts,the upper part being movable, and adapted to clamp the work upon thelower part by its weight, the vertically-movable shaft, to which saidupper part is attached, a collar on the shaft, a cam-lever engaging theunder side of the collar, and a feed-wheel for revolving the work,mounted upon said shaft, substantially as and for the purpose specified.

8. The combination of the work-holder having a movable upper part, theshaft to which the latter is attached, the feed-wheel upon said shaft,said parts operating by their gravity to hold work, and the cam-leverfor raising the shaft, substantially as and for the purpose shown.

9. The combination of the work-holder, composed of two parts which clampthe work between their opposite faces, means for applying power to oneof said parts, to rotate the same, and a couplingpiece extending fromone part to the other and engaging each, whereby the rotation of onepart may be imparted to the other, substantially as and for the purposeset forth.

10. The combination of the two-part workholder, a pivot for one of saidparts, means for applying power to the other part to rotate the same,and a key coupling said parts to cause one to rotate the other providedwith means to engage the work held between them, substantially as andfor the purpose set forth;

11. The combination of the two-part workholder, a pivot for one of saidparts, a shaft carrying the other part, and a key projecting from onepart into an opening in the other, and provided with a rib to engage thework held between the work-holder parts, substantially as and for thepurpose described.

12. In a press, the combination of a ram, a shaft for actuating thesame, a worm on said shaft having a portion of its thread uninclined, awheel engaged by the worm, a vertically-movable shaft carrying saidwheel, and a work-holder comprising an upper and lower part, the upperone being attached to said shaft, substantially as and for the purposespecified.

13. In a press, the combination of the punchcarrying ram, a shaft fromwhich said ram receives motion, a rotary disk-holder, means whereby thelatter may be revolved step by step by said shaft, to pass new portionsof the disk successively into position to be acted on by the punch, andmeans for adjusting the position of the punch relative to the work,whereby the punch may be placed so that in its movement by the ram, itwill not act on the work, and during such movement may be placed so thatit will act on the Work, substantially as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this19th day of May, A. D. 1896.

OBERLIN SMITH.

Witnesses:

JAMES J. REEVES, HUGH L. REEVES.

